♪ Composer's Workshop — Modal Harmony ♪

Building Chords in Every Mode:
A Step-by-Step Workshop

Not just what the chords are — but how to derive them yourself, from any root, in any mode, with complete independence. Each mode treated as its own harmonic universe: scale construction, interval stacking, chord quality derivation, characteristic voicings, and progressive ear-training.
♫ Seven modes  ⏲ Complete derivation method  ♪ All seven diatonic chords per mode  ♫ Applicable to any root

"Knowing a scale is not the same as knowing a key. A key has gravity — a mode has a personality. Learn to build from the inside out."

— after George Russell, Lydian Chromatic Concept

"The modes are not a collection of exotic scales. They are seven different ways the same twelve tones can declare a different home."

— Traditional music theory aphorism
Contents
  1. Foundations — How to Read This Workshop
  2. The Universal Method: Building Any Modal Chord
  3. Mode I — Ionian (Major)
  4. Mode II — Dorian
  5. Mode III — Phrygian
  6. Mode IV — Lydian
  7. Mode V — Mixolydian
  8. Mode VI — Aeolian (Natural Minor)
  9. Mode VII — Locrian
  10. Comparative Mode Map
  11. Transposing to Any Key
  12. Advanced: Modal Mixture & Borrowing
♪ Before You Begin
Foundations — How to Read This Workshop
What you must understand before a single chord is built.
What a Mode Actually Is
A mode is a complete, self-contained scale with its own pattern of whole steps (W) and half steps (H). It is not a fragment of another scale — it is a fully independent tonal system that happens to share the same twelve pitches as other modes when rooted differently. When you compose in a mode, the mode's root is home. Every interval, every chord, every resolution tendency is measured from that root — not from any other key or parent scale.
There are seven diatonic modes, each built from the same basic interval material (five whole steps and two half steps per octave, summing to 12 semitones) but arranged in a different order. The position of the two half steps within the octave is the single most important structural fact about any mode — it determines which scale degrees are lowered or raised compared to the major scale, and therefore which chords are major, minor, or diminished.
What You Must Have Memorised First
Prerequisite knowledge: To use this workshop independently, you need to be able to: (1) name the 12 chromatic pitches without hesitation; (2) count half steps (semitones) between any two notes; (3) identify a major 3rd (4 semitones), minor 3rd (3 semitones), perfect 5th (7 semitones), and minor 7th (10 semitones) by ear and by calculation. Everything in this guide is derived from these four building blocks. If any of these are uncertain, consolidate them before continuing.
The Two Tools You Will Use Constantly
  • Interval Stacking (Third Stacking) Every diatonic chord is built by placing notes a 3rd apart within the mode's scale. You pick the first note (the root of the chord), skip one scale note, land on the 3rd, skip one more, land on the 5th, skip one more, land on the 7th. You always use the mode's own notes — you never introduce outside pitches unless you are intentionally altering the chord.
  • Semitone Measurement (Quality Check) After stacking three notes within the mode, you measure the exact interval between the root and the 3rd (is it 4 semitones = major, or 3 = minor?), and between the root and the 5th (is it 7 semitones = perfect, or 6 = diminished, or 8 = augmented?). These two measurements tell you the chord's quality — major, minor, diminished, or augmented — without needing to memorise anything mode-specific. The derivation is always the same.
Roman Numeral Notation
Roman numerals identify chord function regardless of key. Uppercase = major chord. Lowercase = minor chord. The degree number tells you which scale step the chord is rooted on. The superscript ° means diminished. The superscript + means augmented. A flat (♭) before the numeral means the root of that chord is a half step lower than in the major scale. A sharp (♯) before the numeral means it is raised. Examples: IV = major chord on scale degree 4. ii = minor chord on scale degree 2. vii° = diminished chord on scale degree 7. ♭VII = a major chord whose root is a flattened 7th scale degree.
SymbolMeaningExample (C root)
I, II, III, IV…Major chord on that scale degreeI = C major
i, ii, iii, iv…Minor chord on that scale degreeii = D minor
vii°Diminished chord on scale degree 7vii° = B diminished
III+Augmented chord on scale degree 3III+ = E augmented
♭VIIMajor chord on the flattened 7th degree♭VII = B♭ major (in C context)
Imaj7, V7, ii-7Roman numeral + chord extensionImaj7 = Cmaj7; V7 = G7
The Seven Modes at a Glance — Interval Patterns
W = whole step (2 semitones). H = half step (1 semitone). The position of the H steps defines everything. Compare each mode's H positions to the major (Ionian) pattern: W W H W W W H. Any degree that falls just before an H step (where in Ionian a W would stand) is lowered by one half step — that lowered degree propagates through the chord stack and creates every quality difference between modes.
ModeInterval PatternH Steps Fall Between Degrees…Altered Degrees vs. Major
I — IonianW W H W W W H3–4 and 7–8None (the reference)
II — DorianW H W W W H W2–3 and 6–7♭3, ♭7
III — PhrygianH W W W H W W1–2 and 5–6♭2, ♭3, ♭6, ♭7
IV — LydianW W W H W W H4–5 and 7–8♯4
V — MixolydianW W H W W H W3–4 and 6–7♭7
VI — AeolianW H W W H W W2–3 and 5–6♭3, ♭6, ♭7
VII — LocrianH W W H W W W1–2 and 4–5♭2, ♭3, ♭5, ♭6, ♭7
♪ The Core Skill
The Universal Method: Building Any Modal Chord
One repeatable five-step process that works for every mode, every chord, every key.
Every diatonic chord in any mode is derived by the same method. There are no exceptions. Once you internalise these five steps, you will never need to memorise chord qualities by rote again — you will derive them from first principles in seconds. The steps are applied once per chord; you repeat them for all seven scale degrees of your chosen mode.
Extend to 7th chords: After identifying the triad, continue the stack one more third: take degree n+6 within the scale. Measure semitones from the root to this note. 11 semitones = major 7th; 10 semitones = minor 7th (dominant if the triad is major); 9 semitones = diminished 7th. Add the suffix maj7, 7 (dominant), m7, m7b5, or °7 accordingly. The same five steps apply — just one extra measurement.
Quick Chord Quality Reference — Four Decisions
Root → 3rd (semitones)Root → 5th (semitones)Chord QualitySymbol
4 (major 3rd)7 (perfect 5th)Majormaj, M, uppercase
3 (minor 3rd)7 (perfect 5th)Minormin, m, lowercase
3 (minor 3rd)6 (diminished 5th)Diminisheddim, °
4 (major 3rd)8 (augmented 5th)Augmentedaug, +
Root → 7th (semitones)7th TypeAdded to chord symbol
11Major 7thmaj7 (e.g. Cmaj7)
10Minor 7th (= dominant if triad is major)7 or m7 (e.g. G7, Dm7)
9Diminished 7th°7 (e.g. B°7)
♪ Mode I
Ionian — The Major Mode
Bright, stable, resolved. The reference mode from which all others are derived. Its half steps fall between degrees 3–4 and 7–8.
① Complete Chord Derivation — C Ionian Happy / Resolved / Classical / Pop / Folk
Step 1 — Write the Ionian Scale
Ionian interval pattern: W W H W W W H. From C: the half steps land between E–F (degrees 3–4) and B–C (degrees 7–8). Every other interval is a whole step.
C(1)   D(2)   E(3)   F(4)   G(5)   A(6)   B(7)   [C(8)]
H steps: E–F and B–C
Steps 2–5 — Derive Every Chord
For each of the seven degrees, stack by thirds within the C major scale and measure. Follow along the calculation for degrees 1, 2, and 7 in detail; the pattern for 3–6 is identical in method.

Chord I (root: C)
Stack: C → skip D → E → skip F → G
C→E: 4 semitones (major 3rd). C→G: 7 semitones (perfect 5th).
4 + 7 = major triad. → I — C major
Add 7th: C→B = 11 semitones (major 7th). → Imaj7 — Cmaj7

Chord ii (root: D)
Stack: D → skip E → F → skip G → A
D→F: 3 semitones (minor 3rd). D→A: 7 semitones (perfect 5th).
3 + 7 = minor triad. → ii — D minor
Add 7th: D→C = 10 semitones (minor 7th). → ii-7 — Dm7

Chord iii (root: E)
Stack: E → skip F → G → skip A → B
E→G: 3 semitones (minor 3rd). E→B: 7 semitones (perfect 5th).
iii — E minor   |   Add B→D: 10 st → iii-7 — Em7

Chord IV (root: F)
Stack: F → skip G → A → skip B → C
F→A: 4 semitones (major 3rd). F→C: 7 semitones (perfect 5th).
IV — F major   |   F→E = 11 st → IVmaj7 — Fmaj7

Chord V (root: G)
Stack: G → skip A → B → skip C → D
G→B: 4 semitones (major 3rd). G→D: 7 semitones (perfect 5th).
V — G major   |   G→F = 10 st (minor 7th, dominant) → V7 — G7

Chord vi (root: A)
Stack: A → skip B → C → skip D → E
A→C: 3 semitones (minor 3rd). A→E: 7 semitones (perfect 5th).
vi — A minor   |   A→G = 10 st → vi-7 — Am7

Chord vii° (root: B)
Stack: B → skip C → D → skip E → F
B→D: 3 semitones (minor 3rd). B→F: 6 semitones (diminished 5th).
3 + 6 = diminished triad. → vii° — B diminished
Add 7th: B→A = 10 st (minor 7th) → vii∅7 — Bm7b5 (half-diminished)

Complete Chord Set — C Ionian
Imaj7Cmaj7
iim7Dm7
iiim7Em7
IVmaj7Fmaj7
Vdom7G7
vim7Am7
vii°m7b5Bm7b5
The Ionian fingerprint: The chord quality pattern is always maj – min – min – maj – dom7 – min – half-dim. The V7 is the only dominant 7th — its tritone (B–F, the leading tone against the 4th) is the strongest resolution force in tonal music, pulling V7 → I. This is the basis of all classical functional harmony.
Why vii° is half-diminished, not fully diminished: B–D–F spans 6 semitones (diminished 5th). When you add the 7th (B→A = 10 st, a minor 7th), you get a half-diminished chord (m7b5), not a fully diminished 7th (which would require a diminished 7th, 9 semitones). Ionian has no fully diminished 7th chords unless you alter pitches outside the scale.

Classic Ionian progressions

I IV V I
Imaj7 vi-7 ii-7 V7 Imaj7
Beatles — the majority of Let It Be, Hey Jude, Here Comes the Sun dwell almost entirely in Ionian. Mozart — virtually all his major-key sonata expositions are built from the I, IV, V7 Ionian skeleton. ABBADancing Queen in A major; The Winner Takes It All in B major; pure Ionian emotional directness. ColdplayYellow, The Scientist; the brightness of the Imaj7 and IVmaj7 is quintessentially Ionian.
♪ Mode II
Dorian — The Raised-Sixth Minor
Dark but not hopeless. Minor in character yet brightened by a natural (raised) 6th. The half steps fall between degrees 2–3 and 6–7. Altered vs. Ionian: ♭3, ♭7.
② Complete Chord Derivation — D Dorian Bittersweet / Soulful / Jazz / Rock / Folk
Step 1 — Write the Dorian Scale
Dorian: W H W W W H W. From D. The half steps land between E–F (degrees 2–3) and B–C (degrees 6–7). Compare to D natural minor (Aeolian): Dorian has a natural B instead of B♭. That single difference — the raised 6th — changes three chords.
D(1)   E(2)   F(3)   G(4)   A(5)   B(6)   C(7)
H steps: E–F and B–C.   Raised 6th (B♮) is the Dorian signature.
Steps 2–5 — Derive Every Chord

Chord i (root: D)
Stack: D → FA.   D→F: 3 st (minor 3rd). D→A: 7 st (perfect 5th).
i — D minor   |   D→C: 10 st → i-7 — Dm7

Chord ii (root: E)
Stack: E → GB.   E→G: 3 st (minor 3rd). E→B: 7 st (perfect 5th).
ii — E minor   |   E→D: 10 st → ii-7 — Em7

Chord ♭III (root: F)
Stack: F → AC.   F→A: 4 st (major 3rd). F→C: 7 st (perfect 5th).
♭III — F major   |   F→E (outside scale!)... use scale note E: F→E = 11 st → ♭IIImaj7 — Fmaj7

Chord IV (root: G) — THE DORIAN SIGNATURE CHORD
Stack: G → BD.   G→B: 4 st (major 3rd). G→D: 7 st (perfect 5th).
IV — G major. This is the defining Dorian chord. In Aeolian (natural minor), this chord is iv minor — because Aeolian has B♭ instead of B♮. The raised 6th of Dorian makes this chord major, transforming the entire harmonic colour.
G→F: 10 st → IV7 — G dominant 7th

Chord v (root: A)
Stack: A → CE.   A→C: 3 st (minor 3rd). A→E: 7 st (perfect 5th).
v — A minor   |   A→G: 10 st → v-7 — Am7
Note: This v is minor, not dominant — Dorian has no dominant V7 resolving to i. This is why Dorian doesn't function tonally the way Aeolian does in classical harmony.

Chord vi° (root: B)
Stack: B → DF.   B→D: 3 st (minor 3rd). B→F: 6 st (diminished 5th).
vi° — B diminished   |   B→A: 10 st → vi∅7 — Bm7b5

Chord ♭VII (root: C)
Stack: C → EG.   C→E: 4 st (major 3rd). C→G: 7 st (perfect 5th).
♭VII — C major   |   C→B: 11 st → ♭VIImaj7 — Cmaj7

Complete Chord Set — D Dorian
im7Dm7
iim7Em7
♭IIImaj7Fmaj7
IVdom7G7
vm7Am7
vi°m7b5Bm7b5
♭VIImaj7Cmaj7
The Dorian fingerprint — IV is MAJOR: The single raised 6th (B♮) makes the IV chord major. In any other minor mode (Phrygian, Aeolian, Locrian), the chord on degree 4 is minor (iv). The Dorian IV major chord is the fastest, most unambiguous way to declare "this is Dorian, not natural minor." The i–IV vamp — minor tonic, major subdominant — is the Dorian signature gesture.

The Dorian vamp (core identity)

im7 IV7

Extended progression

im7 ♭IIImaj7 IV7 ♭VIImaj7
Miles DavisSo What (Kind of Blue) is built entirely on D Dorian and E♭ Dorian; John Coltrane's Impressions follows the same template. Pink FloydShine On You Crazy Diamond opens with one of rock's most famous Dorian guitar lines; the IV major chord gives the passage its bittersweet quality. SantanaOye Como Va is a pure Dorian groove in A; the Am7–D7 repeating figure is textbook i–IV. Daft PunkGet Lucky rotates through a Dorian-flavoured Am–C–Em–D figure; the D major chord on degree IV confirms the mode.
♪ Mode III
Phrygian — The Flattened-Second Minor
Dark, menacing, ancient. The half step falls immediately at the start: between degrees 1–2. Altered vs. Ionian: ♭2, ♭3, ♭6, ♭7. The most altered of the minor modes.
③ Complete Chord Derivation — E Phrygian Dark / Flamenco / Spanish / Metal / Ancient Greek
Step 1 — Write the Phrygian Scale
Phrygian: H W W W H W W. From E. The first interval is a half step — E to F. This immediately creates the ♭2 (F♮ in the key of E), the mode's most dramatic feature. Half steps land between degrees 1–2 (E–F) and 5–6 (B–C).
E(1)   F(2)   G(3)   A(4)   B(5)   C(6)   D(7)
H steps: E–F and B–C.   The ♭2 (F) is the Phrygian signature.
Steps 2–5 — Derive Every Chord

Chord i (root: E)
Stack: E → GB.   E→G: 3 st (minor 3rd). E→B: 7 st (perfect 5th).
i — E minor   |   E→D: 10 st → i-7 — Em7

Chord ♭II (root: F) — THE PHRYGIAN SIGNATURE CHORD
Stack: F → AC.   F→A: 4 st (major 3rd). F→C: 7 st (perfect 5th).
♭II — F major. This chord — a major chord a half step above the minor tonic — is unique to Phrygian (and Phrygian Dominant). The motion ♭II → i is the Andalusian cadence. It is a modal resolution, not a dominant function resolution.
F→E: 11 st → ♭IImaj7 — Fmaj7

Chord ♭III (root: G)
Stack: G → BD.   G→B: 4 st (major 3rd). G→D: 7 st (perfect 5th).
♭III — G major   |   G→F: 10 st → ♭III7 — G dominant 7th

Chord iv (root: A)
Stack: A → CE.   A→C: 3 st (minor 3rd). A→E: 7 st (perfect 5th).
iv — A minor   |   A→G: 10 st → iv-7 — Am7

Chord v° (root: B)
Stack: B → DF.   B→D: 3 st (minor 3rd). B→F: 6 st (diminished 5th).
v° — B diminished   |   B→A: 10 st → v∅7 — Bm7b5

Chord ♭VI (root: C)
Stack: C → EG.   C→E: 4 st (major 3rd). C→G: 7 st (perfect 5th).
♭VI — C major   |   C→B: 11 st → ♭VImaj7 — Cmaj7

Chord ♭VII (root: D)
Stack: D → FA.   D→F: 3 st (minor 3rd). D→A: 7 st (perfect 5th).
♭VII — D minor   |   D→C: 10 st → ♭VII-7 — Dm7

Complete Chord Set — E Phrygian
im7Em7
♭IImaj7Fmaj7
♭IIIdom7G7
ivm7Am7
m7b5Bm7b5
♭VImaj7Cmaj7
♭VIIm7Dm7
The Phrygian fingerprint — ♭II is MAJOR and adjacent to i: The ♭II major chord sits only a half step above the minor tonic. The half-step resolution ♭II→i (F major → E minor) is not a V→I resolution — there is no dominant function. It is a descending semitone resolution, producing maximum tension without dominant-function expectation. You cannot get this cadence in any other mode.

Andalusian cadence (defining Phrygian gesture)

im ♭VIImaj7 ♭VImaj7 ♭II im
SoundgardenBlack Hole Sun is built almost entirely on the Phrygian ♭II cadence. MetallicaWherever I May Roam opens with Phrygian riffing; the half-step motion from ♭II to i gives it its ancient, threatening weight. Flamenco guitar — the entire Flamenco harmonic language is Phrygian-centred; the Fandango and Soleares cadences are textbook i–♭VII–♭VI–♭II–i. Lalo Schifrin — the Mission: Impossible theme exploits Phrygian modal tension throughout.
♪ Mode IV
Lydian — The Raised-Fourth Major
Floating, elevated, weightless. The brightest of all modes. Altered vs. Ionian: only ♯4. That single raised 4th transforms the IV chord from Ionian's familiar major into a half-diminished — and creates a unique major II chord.
④ Complete Chord Derivation — F Lydian Floating / Elevated / Cinematic / Dream / Sci-Fi
Step 1 — Write the Lydian Scale
Lydian: W W W H W W H. From F. Three whole steps before the first half step — the tritone (#4) between degree 4 and degree 5. Half steps land between B–C (degrees 4–5) and E–F (degrees 7–8). B♮ is the raised 4th (♯4 of F Lydian).
F(1)   G(2)   A(3)   B(4)   C(5)   D(6)   E(7)
H steps: B–C and E–F.   The ♯4 (B♮) is the Lydian signature.
Steps 2–5 — Derive Every Chord

Chord I (root: F)
Stack: F → AC.   F→A: 4 st. F→C: 7 st. → I — F major
F→E: 11 st → Imaj7 — Fmaj7
Bonus: The ♯4 (B♮) is the natural #11 extension of this chord. Fmaj7(#11) is the definitive Lydian tonic chord.

Chord II (root: G) — THE LYDIAN SIGNATURE CHORD
Stack: G → BD.   G→B: 4 st (major 3rd). G→D: 7 st (perfect 5th).
II — G major. In Ionian (C major), the chord on degree 2 is minor (ii minor). In Lydian, because B♮ is present (the raised 4th of F), the chord on G uses G–B–D, which is major. This is the most distinctive Lydian chord: a major chord a whole step above the major tonic, both chords major, with no resolution pull between them — pure weightless hovering.
G→F: 10 st → II7 — G dominant 7th

Chord iii (root: A)
Stack: A → CE.   A→C: 3 st. A→E: 7 st. → iii — A minor
A→G: 10 st → iii-7 — Am7

Chord #iv° (root: B) — the altered IV
Stack: B → DF.   B→D: 3 st (minor 3rd). B→F: 6 st (diminished 5th).
#iv° — B diminished. Where Ionian has IV major (Fmaj), Lydian has #iv° (Bdim) because the raised 4th (B♮) takes the place of F on degree 4. This removes the resolution to IV altogether.
B→A: 10 st → #iv∅7 — Bm7b5

Chord V (root: C)
Stack: C → EG.   C→E: 4 st. C→G: 7 st. → V — C major
C→B: 11 st → Vmaj7 — Cmaj7
Note: In Lydian, the V chord is Vmaj7, not V7 (dominant). There is no dominant 7th on degree 5 — Lydian does not have a built-in V7→I resolution. This is what gives Lydian its non-functional, floating quality.

Chord vi (root: D)
Stack: D → FA.   D→F: 3 st. D→A: 7 st. → vi — D minor
D→C: 10 st → vi-7 — Dm7

Chord vii (root: E)
Stack: E → GB.   E→G: 3 st. E→B: 7 st. → vii — E minor
E→D: 10 st → vii-7 — Em7

Complete Chord Set — F Lydian
Imaj7(#11)Fmaj7#11
IIdom7G7
iiim7Am7
#iv°m7b5Bm7b5
Vmaj7Cmaj7
vim7Dm7
viim7Em7
The Lydian fingerprint — I and II are both MAJOR: Two adjacent major chords a whole step apart, with no dominant resolution between them. The I–II move sounds spacious, gravity-free, and cinematic. Film composers (John Williams, Jerry Goldsmith, Danny Elfman) use this constantly for wonder, flight, and the supernatural. The Vmaj7 (not V7) means there is no tonal pull back to I — Lydian floats.

The Lydian float (I–II)

Imaj7(#11) II7

Extended cinematic progression

Imaj7 II iii-7 Vmaj7 Imaj7
Joe SatrianiFlying in a Blue Dream, Summer Song; the recurring I→II Lydian suspension is Satriani's harmonic signature. Steve VaiFor the Love of God and The Audience Is Listening use Lydian's weightless major II chord extensively. John Williams — the E.T. flying sequence, sections of Star Wars, and the Schindler's List theme all employ Lydian colour for transcendence and wonder. RadioheadEverything in Its Right Place (Kid A) cycles through a Lydian-influenced major II motion.
♪ Mode V
Mixolydian — The Dominant Major
Major in feel, but with an unstable, bluesy edge from the lowered 7th. Altered vs. Ionian: only ♭7. The mode of rock, blues, and Celtic music. Its half steps fall between degrees 3–4 and 6–7.
⑤ Complete Chord Derivation — G Mixolydian Rock / Blues / Celtic / Folk / Gospel
Step 1 — Write the Mixolydian Scale
Mixolydian: W W H W W H W. From G. The half steps land between B–C (degrees 3–4) and E–F (degrees 6–7). This is identical to the G major scale except the 7th (F) is natural (♮) instead of sharp (♯). That one change — the flattened 7th — is the entire difference between Mixolydian and Ionian.
G(1)   A(2)   B(3)   C(4)   D(5)   E(6)   F(7)
H steps: B–C and E–F.   The ♭7 (F♮) is the Mixolydian signature.
Steps 2–5 — Derive Every Chord

Chord I (root: G) — THIS TONIC IS ITSELF A DOMINANT 7TH
Stack: G → BD.   G→B: 4 st. G→D: 7 st. → I — G major
Add 7th: G→F: 10 st (minor 7th) → I7 — G dominant 7th (G7)
This is the great paradox of Mixolydian: the tonic chord can carry a dominant 7th without any need to resolve, because in this mode F♮ is a native scale tone. The unresolved dominant 7th is what gives Mixolydian its permanent tension-in-repose.

Chord ii (root: A)
Stack: A → CE.   A→C: 3 st. A→E: 7 st. → ii — A minor
A→G: 10 st → ii-7 — Am7

Chord iii° (root: B)
Stack: B → DF.   B→D: 3 st. B→F: 6 st (diminished 5th).
iii° — B diminished   |   B→A: 10 st → iii∅7 — Bm7b5

Chord IV (root: C)
Stack: C → EG.   C→E: 4 st. C→G: 7 st. → IV — C major
C→B: 11 st → IVmaj7 — Cmaj7

Chord v (root: D)
Stack: D → FA.   D→F: 3 st. D→A: 7 st. → v — D minor
D→C: 10 st → v-7 — Dm7
Note: The v is minor, not dominant. As with Dorian, there is no V7→I resolution in Mixolydian — the mode does not have a built-in leading tone pulling up to the root. Rock composers use this to create an open, unresolved feeling. The I7 does all the harmonic work.

Chord ♭VII (root: F) — THE MIXOLYDIAN SIGNATURE CHORD
Stack: F → AC.   F→A: 4 st (major 3rd). F→C: 7 st (perfect 5th).
♭VII — F major. This chord is entirely absent from Ionian — F♮ doesn't exist in G major. In Mixolydian, the major chord a whole step below the tonic (♭VII) is one of the most evocative in rock. The I–♭VII–IV–I loop (or I→♭VII→IV→I) is the backbone of countless rock anthems.
F→E: 11 st → ♭VIImaj7 — Fmaj7

Chord vi (root: E)
Stack: E → GB.   E→G: 3 st. E→B: 7 st. → vi — E minor
E→D: 10 st → vi-7 — Em7

Complete Chord Set — G Mixolydian
Idom7G7
iim7Am7
iii°m7b5Bm7b5
IVmaj7Cmaj7
vm7Dm7
vim7Em7
♭VIImaj7Fmaj7
The Mixolydian fingerprint — the unresolved dominant tonic and the ♭VII: The I7 (G7 sitting on its own root as home) and the ♭VII major (F major, a whole step below) are the twin identifiers of Mixolydian. Every rock song that uses I7 as its home base, or that features a major chord one whole step below the root chord without it resolving upward, is drawing from Mixolydian.

The rock Mixolydian loop

I ♭VII IV I

Blues-rock extension

I7 IV ♭VII IV I7
The BeatlesNorwegian Wood and Tomorrow Never Knows are built on Mixolydian drone and modal loops. Rolling StonesSympathy for the Devil and Honky Tonk Women use I–♭VII–IV Mixolydian structures. Led ZeppelinWhole Lotta Love, Rock and Roll riff in E Mixolydian (I7–♭VII–IV). Celtic/Irish folk — the great majority of jigs and reels in D use D Mixolydian (D7–C–G, I7–♭VII–IV).
♪ Mode VI
Aeolian — Natural Minor
The natural minor scale. Dark, introspective, and emotionally rich. Altered vs. Ionian: ♭3, ♭6, ♭7. The half steps fall between degrees 2–3 and 5–6.
⑥ Complete Chord Derivation — A Aeolian Sad / Introspective / Classical Minor / Pop / Rock
Step 1 — Write the Aeolian Scale
Aeolian: W H W W H W W. From A. Half steps land between B–C (degrees 2–3) and E–F (degrees 5–6). This is the most familiar minor scale — a natural minor. It shares all seven notes with C major but treats A as the tonal centre.
A(1)   B(2)   C(3)   D(4)   E(5)   F(6)   G(7)
H steps: B–C and E–F.   ♭3(C), ♭6(F), ♭7(G) vs. A major.
Steps 2–5 — Derive Every Chord

Chord i (root: A)
Stack: A → CE.   A→C: 3 st. A→E: 7 st. → i — A minor
A→G: 10 st → i-7 — Am7

Chord ii° (root: B)
Stack: B → DF.   B→D: 3 st. B→F: 6 st (diminished 5th).
ii° — B diminished   |   B→A: 10 st → ii∅7 — Bm7b5

Chord ♭III (root: C)
Stack: C → EG.   C→E: 4 st. C→G: 7 st. → ♭III — C major
C→B: 11 st → ♭IIImaj7 — Cmaj7

Chord iv (root: D) — COMPARE TO DORIAN'S IV
Stack: D → FA.   D→F: 3 st (minor 3rd). D→A: 7 st (perfect 5th).
iv — D minor. Because Aeolian has F♮ (the ♭6), stacking thirds from D produces a minor chord. This is the critical contrast with Dorian, which has F♯ (the natural 6) and produces a major IV. The minor iv gives Aeolian a much darker, more conclusive sense of minor tonality.
D→C: 10 st → iv-7 — Dm7

Chord v (root: E)
Stack: E → GB.   E→G: 3 st. E→B: 7 st. → v — E minor
E→D: 10 st → v-7 — Em7
Note: Like Dorian and Mixolydian, pure Aeolian has a minor v, not dominant V. Classical harmony borrows from harmonic minor (raising the 7th to G♯) to create a dominant V7 (E7) in minor keys. In modal Aeolian composition, the minor v is native and the mode avoids classical resolution.

Chord ♭VI (root: F) — THE AEOLIAN SIGNATURE CHORD
Stack: F → AC.   F→A: 4 st (major 3rd). F→C: 7 st (perfect 5th).
♭VI — F major. The major chord on the flattened 6th degree is one of the most emotionally powerful chords in all of popular music — the "surprise lift" in sad songs. The progression i–♭VI–♭VII–i is the backbone of rock ballads and emotional pop.
F→E: 11 st → ♭VImaj7 — Fmaj7

Chord ♭VII (root: G)
Stack: G → BD.   G→B: 4 st (major 3rd). G→D: 7 st (perfect 5th).
♭VII — G major   |   G→F: 10 st → ♭VII7 — G dominant 7th

Complete Chord Set — A Aeolian
im7Am7
ii°m7b5Bm7b5
♭IIImaj7Cmaj7
ivm7Dm7
vm7Em7
♭VImaj7Fmaj7
♭VIIdom7G7
The Aeolian fingerprint — iv is MINOR (contrast with Dorian's major IV): Aeolian's iv minor is the single feature that separates it from Dorian. The minor iv gives Aeolian a more conclusively sad character. The ♭VI major chord — a major chord built on the flattened 6th — provides the emotional "lift" that makes minor-key songs feel both sad and sweeping at once.

Classic rock Aeolian (Am–F–C–G)

i ♭VI ♭III ♭VII

The minor ballad (i–♭VI–♭VII–i)

im ♭VI ♭VII im
AdeleSomeone Like You in A minor; the i–♭VI–♭III–♭VII loop (Am–F–C–G) is textbook Aeolian. RadioheadKarma Police uses an Aeolian structure with the characteristic ♭VI major lift. Classical — Bach's Toccata and Fugue in D minor, Beethoven's Moonlight Sonata, Mozart's Requiem are all built on Aeolian harmony (with classical V7 via harmonic minor). R.E.M.Losing My Religion in A minor with iv–i Aeolian darkening.
♪ Mode VII
Locrian — The Diminished Mode
The only mode with a diminished tonic chord. Maximum alteration: ♭2, ♭3, ♭5, ♭6, ♭7. Because the tonic triad is diminished (inherently unstable), Locrian cannot sustain a tonal centre the way other modes can. This is its power — and its limitation.
⑦ Complete Chord Derivation — B Locrian Unstable / Menacing / Jazz / Metal / Experimental
Step 1 — Write the Locrian Scale
Locrian: H W W H W W W. From B. Half steps land immediately between degrees 1–2 (B–C) and degrees 4–5 (E–F). Locrian is maximally altered — five of its seven degrees are flatted compared to major. The most critical alteration is the ♭5: B♭ is the 5th in B Locrian, not F♯.
B(1)   C(2)   D(3)   E(4)   F(5)   G(6)   A(7)
H steps: B–C and E–F.   ♭2(C), ♭3(D), ♭5(F), ♭6(G), ♭7(A) vs. B major.
Steps 2–5 — Derive Every Chord

Chord i° (root: B) — THE LOCRIAN PARADOX
Stack: B → DF.   B→D: 3 st (minor 3rd). B→F: 6 st (diminished 5th).
i° — B diminished. The tonic chord is itself diminished. A diminished chord has no stable resting point — it always pulls somewhere. This means Locrian cannot create the sense of arrival that other modes provide. Composers use this as a feature, not a bug: Locrian creates perpetual unease.
Add 7th: B→A: 10 st (minor 7th) → i∅7 — Bm7b5 (half-diminished)

Chord ♭II (root: C) — THE LOCRIAN ANCHOR
Stack: C → EG.   C→E: 4 st (major 3rd). C→G: 7 st (perfect 5th).
♭II — C major. Because the tonic cannot be stable, composers using Locrian often lean on ♭II as a quasi-tonic. The ♭II major is the most stable chord in Locrian — it anchors without fully resolving.
C→B: 11 st → ♭IImaj7 — Cmaj7

Chord ♭III (root: D)
Stack: D → FA.   D→F: 3 st. D→A: 7 st. → ♭III — D minor
D→C: 10 st → ♭III-7 — Dm7

Chord iv (root: E)
Stack: E → GB.   E→G: 3 st. E→B: 7 st. → iv — E minor
E→D: 10 st → iv-7 — Em7

Chord ♭V (root: F)
Stack: F → AC.   F→A: 4 st. F→C: 7 st. → ♭V — F major
F→E: 11 st → ♭Vmaj7 — Fmaj7

Chord ♭VI (root: G)
Stack: G → BD.   G→B: 4 st. G→D: 7 st. → ♭VI — G major
G→F: 10 st → ♭VI7 — G dominant 7th

Chord ♭VII (root: A)
Stack: A → CE.   A→C: 3 st. A→E: 7 st. → ♭VII — A minor
A→G: 10 st → ♭VII-7 — Am7

Complete Chord Set — B Locrian
m7b5Bm7b5
♭IImaj7Cmaj7
♭IIIm7Dm7
ivm7Em7
♭Vmaj7Fmaj7
♭VIdom7G7
♭VIIm7Am7
The Locrian paradox — composing without a stable home: Locrian is the only mode where the tonic chord (i°) is inherently unstable. Most composers resolve this in one of three ways: (1) use the i° as a passing chord rather than a resting point; (2) lean on ♭II as a substitute tonic; (3) use only the scale colours (the melodic intervals) over a different, stable bass note — this is Locrian used as a colour layer, not a true tonal centre. Jazz composers use Locrian most commonly over the ii∅7 (half-diminished) chord in a ii∅7–V7–i minor progression.

Jazz ii∅7 usage (Locrian on the ii chord)

ii∅7 V7alt im7

Locrian modal composition (using ♭II as anchor)

♭II ♭VI7 ♭VII
BjörkArmy of Me and sections of Debut use Locrian-influenced melodic lines over static harmonic fields. John Coltrane — Locrian is used on ii∅7 chords in modal jazz, especially on A Love Supreme and Giant Steps transitions. Guthrie Govan — has composed explicitly in Locrian for guitar (discussed in his Fusion improvisation lectures) as an exercise in non-resolving modal composition. Film scores — Locrian appears in horror and thriller underscore to create structural instability — the listener subconsciously senses the lack of a stable harmonic home.
♪ All Seven Together
Comparative Mode Map
Every mode's complete chord quality set in one view. Use this as a derivation check — after building any mode's chords from scratch, verify your results against this table.
The table below shows chord qualities for all seven modes, rooted on the same tonic so you can see how alterations ripple through the chord stack. Note: this table uses a single fixed root — in practice you transpose each mode to your own root by following the derivation steps above.
Mode I / iII / iiIII / iiiIV / ivV / vVI / viVII / vii
I Ionian Imaj7ii-7iii-7IVmaj7V7vi-7vii∅7
II Dorian i-7ii-7♭IIImaj7IV7★v-7vi∅7♭VIImaj7
III Phrygian i-7♭IImaj7★♭III7iv-7v∅7♭VImaj7♭VII-7
IV Lydian Imaj7(#11)★II7iii-7#iv∅7Vmaj7vi-7vii-7
V Mixolydian I7★ii-7iii∅7IVmaj7v-7vi-7♭VIImaj7
VI Aeolian i-7ii∅7♭IIImaj7iv-7★v-7♭VImaj7♭VII7
VII Locrian i∅7★♭IImaj7♭III-7iv-7♭Vmaj7♭VI7♭VII-7
How to read the ★ markers: Each ★ marks the characteristic chord — the chord whose quality is unique to that mode and cannot be found in any of the other six. This is the chord you should build first when establishing modal identity. It is the one chord that proves to a listener's ear: "we are in this mode, not any other."
Characteristic Chord Summary — One Sentence Each
  • Ionian — V7 (dominant)The only mode with a true dominant 7th on degree V that creates a V7→I resolution. Everything else has a minor v or a major V without the dominant 7th flavour.
  • Dorian — IV majorAll other minor modes have a minor iv; Dorian alone has a major IV because its natural 6th (the raised 6th) participates in the chord stack on degree 4.
  • Phrygian — ♭II majorThe major chord a half step above the tonic exists only in Phrygian and Phrygian Dominant; its semitone approach to i is the Andalusian cadence.
  • Lydian — Imaj7(#11) and II majorLydian is the only major mode where both I and II are major chords; the II major (a whole step above the tonic) has no equivalent in any other mode.
  • Mixolydian — I dominant 7thOnly in Mixolydian does the tonic chord naturally carry a dominant 7th; in every other mode, a dominant 7th on degree I would require alteration.
  • Aeolian — iv minorThe minor iv (vs. Dorian's major IV) is the single feature distinguishing Aeolian from Dorian; its presence creates a darker, more decisively minor colour.
  • Locrian — i° diminished tonicNo other mode has a diminished chord on degree I; Locrian's inherent instability at the tonal centre makes all harmonic motion feel unresolved.
♪ Independence in Practice
Transposing to Any Key — The Derivation in Motion
This section shows you how to derive an entire modal chord set from scratch for any root — no memorisation required, only the five-step method applied systematically.
The five-step method is entirely root-agnostic. You can apply it to any note as the starting point. The only things you need to carry in memory are: (1) the interval pattern (W/H sequence) for your chosen mode; and (2) the semitone counting rule for chord quality. Let us build a complete example from an unusual root to demonstrate full independence.
Worked Example — F♯ Dorian (an uncommon root)
  • 1
    Write the Dorian scale from F♯
    Dorian pattern: W H W W W H W. Start on F♯ and apply each step.
    F♯ →(W)→ G♯ →(H)→ A →(W)→ B →(W)→ C♯ →(W)→ D♯ →(H)→ E →(W)→ [F♯]
    Scale: F♯(1) G♯(2) A(3) B(4) C♯(5) D♯(6) E(7)
  • 2
    Build all seven chord stacks from within the scale
    Take every other note for each starting degree, wrapping round when you pass degree 7.
    i: F♯–A–C♯   |   ii: G♯–B–D♯   |   ♭III: A–C♯–E   |   IV: B–D♯–F♯
    v: C♯–E–G♯   |   vi°: D♯–F♯–A   |   ♭VII: E–G♯–B
  • 3
    Measure each chord's intervals
    Count semitones root→3rd and root→5th for every chord.
    i (F♯–A–C♯): F♯→A = 3st, F♯→C♯ = 7st → minor
    ii (G♯–B–D♯): G♯→B = 3st, G♯→D♯ = 7st → minor
    ♭III (A–C♯–E): A→C♯ = 4st, A→E = 7st → major
    IV (B–D♯–F♯): B→D♯ = 4st, B→F♯ = 7st → MAJOR ★ Dorian signature
    v (C♯–E–G♯): C♯→E = 3st, C♯→G♯ = 7st → minor
    vi° (D♯–F♯–A): D♯→F♯ = 3st, D♯→A = 6st → diminished
    ♭VII (E–G♯–B): E→G♯ = 4st, E→B = 7st → major
  • 4
    Add 7th extensions (continue the stack one more third)
    Stack one additional scale note onto each triad to get seventh chords.
    i-7: F♯m7   |   ii-7: G♯m7   |   ♭IIImaj7: Amaj7   |   IV7: B7
    v-7: C♯m7   |   vi∅7: D♯m7b5   |   ♭VIImaj7: Emaj7
  • 5
    Verify the Dorian signature is present
    The IV chord (B major) is major — confirmed. D♯ is the natural 6th of F♯, and D♯ participates in the B chord (B–D♯–F♯), making it major. If we were in F♯ Aeolian instead, degree 6 would be D♮ and the IV chord would be B–D–F♯ (minor). The D♯ is everything.
    F♯ Dorian complete: F♯m7 | G♯m7 | Amaj7 | B7 | C♯m7 | D♯m7b5 | Emaj7
Transposition Practice Schedule
Independence is achieved through repetition of the derivation, not through memorisation of lists. Use the following schedule: each session, choose one mode and two roots you have not used before. Derive the complete seven-chord set (triads and 7ths). Verify by checking the characteristic chord. When you can do this for any mode in any key without reference material in under five minutes, you are harmonically independent.
WeekModeTarget RootsCharacteristic Chord to Verify
1IonianC, G, F, D, B♭V7 — dominant on degree 5
2DorianD, A, E, G, B♭IV major — major on degree 4
3MixolydianG, D, A, E♭, BI7 — dominant tonic; ♭VII major
4AeolianA, E, D, C, F♯iv minor — minor on degree 4
5PhrygianE, B, F♯, C♯, A♭II major — major one semitone above i
6LydianF, C, G, D, AII major — major one whole step above I
7LocrianB, F♯, C♯, E, Gi° diminished — diminished on degree 1
8All modesB♭, E♭, A♭, D♭, G♭All characteristic chords, flat keys
♪ Beyond Single Modes
Advanced: Modal Mixture & Borrowing
Once you can build chords within any single mode, the next skill is borrowing chords from parallel modes — using the derived chord vocabulary of one mode while centred in another.

"Modes are not decorations. They are different ways of inhabiting musical space — each with its own gravity, its own horizon, its own logic of home and away."

— after Miles Davis / George Russell tradition

"The composer who can derive every chord from first principles is free. The one who memorises lists is imprisoned by the limits of someone else's memory."

— Workshop aphorism